1 . —Do you mind if I use a phone?
—     

A．Why not?

B．That’s all right.

C．Come on!

D．Be my guest!

2 . -------- Shall we go out to play basketball?
------ ______? It’s my favourite.

A．How come

B．Why not

C．So what

D．What for

3 . ------ Would you like to go to the cinema with us tonight?
------ ______, but I have something important to do.

A．Never mind

B．I’d love to

C．I’m afraid not

D．Don’t worry.